Inverter question?

I have recently made a pond in my garden and to avoid spending lots of money in electricity, I decided that I would power it with a solar panel. My pump is 220v 34w, so I thought that a 40 or 50w solar panel should work. However, i can't find any 40-50w inverter, only about 150w. So, my question is, will a 150w inverter draw 150w from the solar panel if powering only the 34w pump? In other words, will a 40-50w solar panel be able to power a 34w pump via a 150w inverter or would I need a 150W solar panel for that?

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petercd3 years ago

Tthe inverter does have a small idle current even when its doing nothing, but the pump connected to the inverter will determine max current draw, in a nutshell... you will be safe.

tgferreira184 (author)  petercd3 years ago


Check this instructable out. It gives you a detailed guide to setting up a solar system.

Screen Shot 2014-10-05 at 10.35.28 am.png

you need to forget the inverter, they are energy hungry and will require a battery, and solar regulator and some way of turning the pump off and on so the battery is not fully discharged and damaged.

for less than the price of a battery you can solve all of those issues with a dc solar pump, just wire it direct to the panel and your done for $15

also have a look at

tgferreira184 (author)  liquidhandwash3 years ago

I can't buy a new pump, I have just bought and installed mine.